Bal's No-Butter Chicken

2 tablespoons grapeseed oil 1 small red onion, chopped 2 tablespoons chopped fresh garlic 1 tablespoon chopped fresh ginger 2 tablespoons tomato paste 1 tablespoon brown sugar 1 tablespoon cumin seeds 1 tablespoon garam masala 1 teaspoon red chile flakes 1 teaspoon turmeric 1 teaspoon salt 1 pound chicken breasts, boneless and skinless, cut into cubes 1/4 cup low-fat yogurt 1/2 cup water Serving suggestion: Serve with roti or rice.